Door-opener.



0. GLEARY.

DOOR OPENER.-

I APPLICATION FILED H1118, 1910 974,359. Patented Nov. 1,1910.

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G. GLEARY.

. DOOR OPENER. AP'PLIo'ATIoN rum) rum. 1910.

Patented Nov. 1, 1910.

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Tn: NORRIS PETER; col, WASHINGTON. n. c.

CORNELIUS CLEARY, 0F IRONTON, OHIO.

DOOR-0PENER.

Specification of Letters Patent.

Patented Nov. 1, 1910.

Application filed February 18, 1910. Serial No. 544,604.

To all whom it may concern:

Be it known that I, CORNELIUS CLEARY, a citizen of the United States,residing at Ironton, in the county of Lawrence, State of Ohio, haveinvented certain new and useful Improvements in Door-Openers; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The invention relates to door operating mechanism and more particularlyto the class of furnace door openers.

The primary object of the invention is the provision of a door opener ofthis character in which the door may be swung to opened position so asto permit ready and easy stoking of the furnace, thus obviating thenecessity of manually handling the door for firing purposes.

Another object of the invention is the pro vision of a device of thischaracter in which a door by partially automatic action may be swung toan opened position, thereby enabling rapid firlng or stokingof a furnaceand which door may be held in various adjusted opened positions wherebythe temperature of the fire may be controlled or regulated.

A further object of the invention is the provision of a door opener inwhich a furnace door after having been swung to opened position may besubsequently closed by gravity when the foot of an operator has beenremoved from the foot lever of the door opening mechanism.

With these and other objects in view, the

invention consists in the construction, combination, and arrangement ofparts, as will be hereinafter more fully described in detail,

illustrated in the accompanying drawings,

which disclose the preferred form of embodiment of the invention, toenable those skilled in the art to practicethe invention, and as pointedout in the claim hereunto appended.

I11 the drawings :Figure 1 is a front elevation of a furnace'door withthe invention applied thereto. Fig. 2 is a side elevation thereof, thedoor being shown in a partially opened position. Fig. 3 is alongitudinal vertical sectional view. Fig. 4 is a top plan view showingthe door closed.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the drawin s by numerals, 5 designates a furnace door ramewhich is of the ordinary well known construction having mounted thereona vertically swinging door 6, the latter being connected to the frame 5,by means of hinges 7, each comprising a leaf hinge section 8, to whichlatter is connected by a pivot 9, an car 10, integral with and risingfrom the upper edge of the door 6, so that the said door will swing inan arc of a circle when vertically raised to an opened position in amanner as will be hereinafter more fully described.

Rising from a suitable foundation or flooring at the front of thefurnace door are spaced vertical lugs 11, between which is disposed afoot treadle 12, the latter being connected to the lugs intermediate itsends by a pivot 13, so that the said lever may be rocked when actuatedby the foot of a person and to this lever at one end is pivoted the stemportion 14, of a yoke frame 15, the ends of which terminate in eyes 16,loosely receiving laterally extendin lugs or trunnions '17 projectingoutwardly from opposite ends of the door 6, and by this yoke frame 15,upon actuating the foot treadle the door may be swung to openedposition.

Secured at one side of the door 6, to the door frame 5, is an upwardlyand outwardly extending segment-shaped rack bar 18, provided withratchet teeth 19 on its inner or concave edge, and engaging the saidteeth 19, is a pivotal latch 20, the latter mounted upon the door 6, sothat upon opening the door the latter may be held in various adjustedopened positions. The rack bar 18, serves as a keeper for the latch 20,pivoted to the door 6, the latch 20, being released from the keeper inany suitable manner when it is desired to have the door swing to closedposition by its own gravity of movement. The said door 6, is alsoprovided with a suitable latch 21, engageable with a keeper 22, and thislatch 21., is adapted to slide over the keeper when the door is beingmoved or swun r to opened position upon actuating the UGM le of the dooropening mechanism.

What is claimed is In combination, a furnace having a door frame, a doorhinged 011 its upper edge to the frame, trunnions rigid with the sidesof the door, a yoke having eyes pivotally connected with the trunnions,a lever pivoted to the lower end of the yoke, a fulcrum supportpivotally c'onnect'ed t6 the lever, said lever having a treadle portidmasegmental rack fixed at its lower end to one side of the door-frame andextending outwardly and 5 upwardly from the lower part of the doorframe,said Segmental rack having teeth on its inner c'oncave edge and itsupper end formed into a rounded terminal, a latch pivoted t0 One side ofthe door and adapted to 10 .engage the teeth of the rack, a spring fixedv t6 the door and adapted to hold the latch .normallyagainstthe teeth ofthe rack, and

CORNELIUS CLEARY Vitnesses THos. D. SHIRHEY, EMMA JACKSON.

